Tests

Introduce maintenance mode #1634

Job	Run time
Build microceph snap	5m 23s
Run Unit tests	2m 41s
Single node with encryption	7m 56s
Multi node testing with custom microceph IP	4m 53s
Test MicroCeph Cluster features.	2m 50s
Test with loopback file OSDs	2m 26s
Multi node testing	9m 3s
Test MicroCeph Remote Replication features.	7m 4s
Test maintenance mode	9m 20s
Test quincy upgrades	6m 56s
Test reef upgrades	8m 31s
Test WAL/DB device usage	3m 24s
	1h 10m 27s

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